#ifndef _ASM_X86_TOPOLOGY_H
#define _ASM_X86_TOPOLOGY_H
-#ifdef CONFIG_NUMA
-#include <linux/cpumask.h>
-#include <asm/mpspec.h>
-
-/* Mappings between logical cpu number and node number */
#ifdef CONFIG_X86_32
-extern int cpu_to_node_map[];
+# ifdef CONFIG_X86_HT
+# define ENABLE_TOPO_DEFINES
+# endif
#else
-/* Returns the number of the current Node. */
-#define numa_node_id() (early_cpu_to_node(raw_smp_processor_id()))
+# ifdef CONFIG_SMP
+# define ENABLE_TOPO_DEFINES
+# endif
#endif
-DECLARE_PER_CPU(int, x86_cpu_to_node_map);
+/* Node not present */
+#define NUMA_NO_NODE (-1)
+
+#ifdef CONFIG_NUMA
+#include <linux/cpumask.h>
+#include <asm/mpspec.h>
-#ifdef CONFIG_SMP
-extern int x86_cpu_to_node_map_init[];
-extern void *x86_cpu_to_node_map_early_ptr;
-#else
-#define x86_cpu_to_node_map_early_ptr NULL
-#endif
+#ifdef CONFIG_X86_32
+/* Mappings between node number and cpus on that node. */
extern cpumask_t node_to_cpumask_map[];
-#define NUMA_NO_NODE (-1)
+/* Mappings between logical cpu number and node number */
+extern int cpu_to_node_map[];
/* Returns the number of the node containing CPU 'cpu' */
-#ifdef CONFIG_X86_32
-#define early_cpu_to_node(cpu) cpu_to_node(cpu)
static inline int cpu_to_node(int cpu)
{
return cpu_to_node_map[cpu];
}
+#define early_cpu_to_node(cpu) cpu_to_node(cpu)
-#else /* CONFIG_X86_64 */
-
-#ifdef CONFIG_SMP
-static inline int early_cpu_to_node(int cpu)
+/* Returns a bitmask of CPUs on Node 'node'.
+ *
+ * Side note: this function creates the returned cpumask on the stack
+ * so with a high NR_CPUS count, excessive stack space is used. The
+ * node_to_cpumask_ptr function should be used whenever possible.
+ */
+static inline cpumask_t node_to_cpumask(int node)
{
- int *cpu_to_node_map = x86_cpu_to_node_map_early_ptr;
-
- if (cpu_to_node_map)
- return cpu_to_node_map[cpu];
- else if (per_cpu_offset(cpu))
- return per_cpu(x86_cpu_to_node_map, cpu);
- else
- return NUMA_NO_NODE;
+ return node_to_cpumask_map[node];
}
-#else
-#define early_cpu_to_node(cpu) cpu_to_node(cpu)
-#endif
+#else /* CONFIG_X86_64 */
+
+/* Mappings between node number and cpus on that node. */
+extern cpumask_t *node_to_cpumask_map;
+
+/* Mappings between logical cpu number and node number */
+DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
+
+/* Returns the number of the current Node. */
+#define numa_node_id() read_pda(nodenumber)
+
+#ifdef CONFIG_DEBUG_PER_CPU_MAPS
+extern int cpu_to_node(int cpu);
+extern int early_cpu_to_node(int cpu);
+extern const cpumask_t *_node_to_cpumask_ptr(int node);
+extern cpumask_t node_to_cpumask(int node);
+
+#else /* !CONFIG_DEBUG_PER_CPU_MAPS */
+
+/* Returns the number of the node containing CPU 'cpu' */
static inline int cpu_to_node(int cpu)
{
-#ifdef CONFIG_DEBUG_PER_CPU_MAPS
- if (x86_cpu_to_node_map_early_ptr) {
- printk("KERN_NOTICE cpu_to_node(%d): usage too early!\n",
- (int)cpu);
- dump_stack();
- return ((int *)x86_cpu_to_node_map_early_ptr)[cpu];
- }
-#endif
return per_cpu(x86_cpu_to_node_map, cpu);
}
-#ifdef CONFIG_NUMA
+/* Same function but used if called before per_cpu areas are setup */
+static inline int early_cpu_to_node(int cpu)
+{
+ if (early_per_cpu_ptr(x86_cpu_to_node_map))
+ return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
+
+ return per_cpu(x86_cpu_to_node_map, cpu);
+}
/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
+static inline const cpumask_t *_node_to_cpumask_ptr(int node)
+{
+ return &node_to_cpumask_map[node];
+}
+
+/* Returns a bitmask of CPUs on Node 'node'. */
+static inline cpumask_t node_to_cpumask(int node)
+{
+ return node_to_cpumask_map[node];
+}
+
+#endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
+
+/* Replace default node_to_cpumask_ptr with optimized version */
#define node_to_cpumask_ptr(v, node) \
- cpumask_t *v = &(node_to_cpumask_map[node])
+ const cpumask_t *v = _node_to_cpumask_ptr(node)
#define node_to_cpumask_ptr_next(v, node) \
- v = &(node_to_cpumask_map[node])
-#endif
+ v = _node_to_cpumask_ptr(node)
#endif /* CONFIG_X86_64 */
*/
#define parent_node(node) (node)
-/* Returns a bitmask of CPUs on Node 'node'. */
-static inline cpumask_t node_to_cpumask(int node)
-{
- return node_to_cpumask_map[node];
-}
-
-/* Returns the number of the first CPU on Node 'node'. */
-static inline int node_to_first_cpu(int node)
-{
- cpumask_t mask = node_to_cpumask(node);
-
- return first_cpu(mask);
-}
-
#define pcibus_to_node(bus) __pcibus_to_node(bus)
#define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus)
extern unsigned long node_remap_size[];
#define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
-# ifdef CONFIG_X86_HT
-# define ENABLE_TOPO_DEFINES
-# endif
-
# define SD_CACHE_NICE_TRIES 1
# define SD_IDLE_IDX 1
# define SD_NEWIDLE_IDX 2
#else
-# ifdef CONFIG_SMP
-# define ENABLE_TOPO_DEFINES
-# endif
-
# define SD_CACHE_NICE_TRIES 2
# define SD_IDLE_IDX 2
# define SD_NEWIDLE_IDX 2
#define node_distance(a, b) __node_distance(a, b)
#endif
-#else /* CONFIG_NUMA */
+#else /* !CONFIG_NUMA */
+
+#define numa_node_id() 0
+#define cpu_to_node(cpu) 0
+#define early_cpu_to_node(cpu) 0
+static inline const cpumask_t *_node_to_cpumask_ptr(int node)
+{
+ return &cpu_online_map;
+}
+static inline cpumask_t node_to_cpumask(int node)
+{
+ return cpu_online_map;
+}
+static inline int node_to_first_cpu(int node)
+{
+ return first_cpu(cpu_online_map);
+}
+
+/* Replace default node_to_cpumask_ptr with optimized version */
+#define node_to_cpumask_ptr(v, node) \
+ const cpumask_t *v = _node_to_cpumask_ptr(node)
+
+#define node_to_cpumask_ptr_next(v, node) \
+ v = _node_to_cpumask_ptr(node)
#endif
#include <asm-generic/topology.h>
+#ifdef CONFIG_NUMA
+/* Returns the number of the first CPU on Node 'node'. */
+static inline int node_to_first_cpu(int node)
+{
+ node_to_cpumask_ptr(mask, node);
+ return first_cpu(*mask);
+}
+#endif
+
extern cpumask_t cpu_coregroup_map(int cpu);
#ifdef ENABLE_TOPO_DEFINES
#define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
#define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu))
#define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu))
+
+/* indicates that pointers to the topology cpumask_t maps are valid */
+#define arch_provides_topology_pointers yes
#endif
static inline void arch_fix_phys_package_id(int num, u32 slot)
}
#endif
-#endif
+#endif /* _ASM_X86_TOPOLOGY_H */
git.openpandora.org / pandora-kernel.git / blobdiff